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opt: only animate tiles in frustum #7

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opt: only animate tiles in frustum #7

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49 changes: 36 additions & 13 deletions src/components/canvas/InstancedTiles.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,7 @@ const TileInstances = ({
const mainInstancedMeshRef = useRef<THREE.InstancedMesh>(null)
const topInstancedMeshRef = useRef<THREE.InstancedMesh>(null)
const bottomInstancedMeshRef = useRef<THREE.InstancedMesh>(null)
const frustum = useRef<THREE.Frustum>(new THREE.Frustum())
const boundingBox = useMemo(() => {
const bb = new THREE.Box3()
bb.min.set(position[0] - 1, position[1], position[2] - 1)
Expand Down Expand Up @@ -95,26 +96,48 @@ const TileInstances = ({

useEffect(() => {
setTileStates((tileStates) =>
tileStates.map((tileState, index) =>
tileState.flipped !== (tiles[index].address !== '0x0') && tileState.animationState === ANIMATION_STATES.IDLE
? {
...tileState,
flipped: tiles[index].address !== '0x0',
animationState: ANIMATION_STATES.JUMPING,
animationProgress: 0,
}
: tileState,
),
tileStates.map((tileState, index) => {
const newState = { ...tileState }
if (
tileState.flipped !== (tiles[index].address !== '0x0') &&
tileState.animationState === ANIMATION_STATES.IDLE
) {
newState.flipped = tiles[index].address !== '0x0'
newState.animationState = ANIMATION_STATES.JUMPING
newState.animationProgress = 0
}

const tileBB = new THREE.Box3()
tileBB.min.set(
position[0] + (tileState.position.x - 1) * TILE_SIZE * 1.1,
position[1],
position[2] + (tileState.position.z - 1) * TILE_SIZE * 1.1,
)
tileBB.max.set(
position[0] + (tileState.position.x + 1) * TILE_SIZE * 1.1,
position[1] + TILE_SIZE * 0.1,
position[2] + (tileState.position.z + 1) * TILE_SIZE * 1.1,
)

if (!frustum.current!.intersectsBox(tileBB)) {
newState.animationState = ANIMATION_STATES.IDLE
newState.animationProgress = 0
newState.position.y = 0
newState.rotation.x = newState.flipped ? Math.PI : 0
newState.color = newState.flipped ? TILE_SMILEY_SIDE_COLOR : TILE_ROBOT_SIDE_COLOR
}

return newState
}),
)
}, [tiles])

useFrame((state, delta) => {
const frustum = new THREE.Frustum()
frustum.setFromProjectionMatrix(
frustum.current!.setFromProjectionMatrix(
new THREE.Matrix4().multiplyMatrices(state.camera.projectionMatrix, state.camera.matrixWorldInverse),
)

tileGroupRef.current!.visible = frustum.intersectsBox(boundingBox)
tileGroupRef.current!.visible = frustum.current!.intersectsBox(boundingBox)

const jumpHeight = 0.5
const hoverHeight = 0.1
Expand Down